bio test 1 review - How are all organisms alike? 1. 2. 3....

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How are all organisms alike? 1. Consist of organized parts 2. Made up of cells 3. Perform chemical reactions 4. Obtain energy from surroundings 5. Respond to their environment 6. Mature over time / change over their lifetime 7. Reproduce 8. Share a common evolutionary history How do organisms self-regulate? - Create a barrier, cell membranes - Actively resist change, homeostasis- detecting change and counteracting it Eukaryotic- contain nucleus, organelles; plants, animals, fungi, protests Prokaryotic- no nuclei, no membrane closed organelles, genetic material not enclosed, bacteria Covalent bonds: sharing molecules 1 st ring=2 2 nd ring=8 Hydrogen wants 1, carbon wants 4, oxygen wants 2 Hydrogen bonds hold water molecules together between molecules Lipids= fats oils, gasoline Fatty acid has backbone of 18 carbons, linear Acetate: O H C – C – H HO H Saturated fatty acid has NO double bonds (18:0)
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Oleic acid, monosaturated fatty acid (18:1) chain bends in the middle Linoleic acid, polyunsaturated fatty acid (18:2) Steroids have ring shape Fatty acids communicate using short distance signals Triglycerol – energy storage Phospholipids – membranes Head group Cholesterol- small negative charge Fills in membrane (between tails) and keeps them fluid Membranes are made of phospholipids, cholesterol, proteins, carbohydrates
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This test prep was uploaded on 04/21/2008 for the course BIO 301L taught by Professor Wandelt during the Fall '07 term at University of Texas at Austin.

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bio test 1 review - How are all organisms alike? 1. 2. 3....

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